The human RECQ1 helicase is highly expressed in glioblastoma and plays an important role in tumor cell proliferation.

The human RECQ1 helicase is highly expressed in glioblastoma and plays an important role in tumor cell proliferation.
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DOI:
10.1186/1476-4598-10-83
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发表时间:
2011-07-13
期刊:
影响因子:
37.3
通讯作者:
Vindigni A
Vindigni A
中科院分区:
医学1区
文献类型:
--
作者:
Mendoza-Maldonado R;Faoro V;Bajpai S;Berti M;Odreman F;Vindigni M;Ius T;Ghasemian A;Bonin S;Skrap M;Stanta G;Vindigni A

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RecQ 解旋酶在维持基因组稳定性中发挥着重要作用。在人类中,RecQ 解旋酶功能的丧失与癌症和/或过早衰老的倾向有关。目前的数据表明,人类 RECQ1 解旋酶的特异性缺失会导致癌细胞有丝分裂灾难并抑制小鼠肿瘤生长。在这里,我们发现 RECQ1 在各种类型的实体瘤中高表达。然而,仅在脑胶质瘤的情况下,胶质母细胞瘤组织中 RECQ1 的高表达与对照样本中的低表达是平行的,这是由于 RECQ1 在非分裂组织中表达较差。这一结论通过对包含 63 个原发性胶质母细胞瘤和 19 个病灶周围组织样本(作为对照)的组织微阵列的免疫组织化学分析得到验证。我们还表明,RNAi 对 RECQ1 的急性耗竭会导致 T98G 和 U-87 胶质母细胞瘤细胞中细胞增殖的显着减少、S 期进展的扰动以及自发 γ-H2AX 灶的形成。此外,RECQ1耗尽的T98G和U-87细胞对HU或替莫唑胺治疗过敏。总的来说,这些结果表明 RECQ1 在维持基因组完整性方面具有独特而重要的作用。我们的结果还表明,RECQ1 可能代表了旨在阻止脑胶质瘤细胞增殖的抗癌疗法的一个新的合适靶点。
RecQ helicases play an essential role in the maintenance of genome stability. In humans, loss of RecQ helicase function is linked with predisposition to cancer and/or premature ageing. Current data show that the specific depletion of the human RECQ1 helicase leads to mitotic catastrophe in cancer cells and inhibition of tumor growth in mice. Here, we show that RECQ1 is highly expressed in various types of solid tumors. However, only in the case of brain gliomas, the high expression of RECQ1 in glioblastoma tissues is paralleled by a lower expression in the control samples due to the poor expression of RECQ1 in non-dividing tissues. This conclusion is validated by immunohistochemical analysis of a tissue microarray containing 63 primary glioblastomas and 19 perilesional tissue samples, as control. We also show that acute depletion of RECQ1 by RNAi results in a significant reduction of cellular proliferation, perturbation of S-phase progression, and spontaneous γ-H2AX foci formation in T98G and U-87 glioblastoma cells. Moreover, RECQ1 depleted T98G and U-87 cells are hypersensitive to HU or temozolomide treatment. Collectively, these results indicate that RECQ1 has a unique and important role in the maintenance of genome integrity. Our results also suggest that RECQ1 might represent a new suitable target for anti cancer therapies aimed to arrest cell proliferation in brain gliomas.
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